Hitachi F-ZTAT H8/3039 Series Hardware Manual page 136

Pin Auto-Wait Mode: If the WAIT pin is low, the number of wait states (T
WC1 and WC0 are inserted.
In pin auto-wait mode, if the WAIT pin is low at the fall of the system clock (ø) in the T
number of wait states (T
are inserted even if the WAIT pin remains low.
Figure 6-7 shows the timing when the wait count is 1.
ø
WAIT
Address bus
AS
RD
Read
access
Data bus
WR
Write
access
Data bus
Note: * Arrows indicate time of sampling of the
124
) selected by bits WC1 and WC0 are inserted. No additional wait states
W
T T
1 2
*
External address
Read data
Write data
WAIT
Figure 6-7 Pin Auto-Wait Mode
T T T
3 1
External address
pin.
) selected by bits
W
T T
2 W 3
*
Read data
Write data
state, the
2